Harman India — JBL Soundbar SB270

The product causing problem in pairing within one month of purchase. I have complaint to JBL. Service center ask me to pay 2500/- rupees for repair the product whereas the product is under warranty. the technician says that the product's PCB damaged due to electrical supply fluctuations whereas I have many electrical equipment they do not show any problem except this jbl soundbar.
It is very painful to see this type of service from JBL.
the brand is behaving as I purchased a chinese product without warranty
At this situation I don't see any difference between local product without warranty and a branded product with warranty.
The complaint number is UP-C[protected]